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Correction for matrix effects in x‐ray fluorescence analysis of finite media
Author(s) -
BenHaim Yakov
Publication year - 1980
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1300090403
Subject(s) - analyte , calibration , calibration curve , fluorescence , analytical chemistry (journal) , matrix (chemical analysis) , binary number , chemistry , absorption (acoustics) , x ray fluorescence , materials science , chromatography , optics , mathematics , detection limit , physics , statistics , arithmetic , composite material
A procedure is presented for constructing calibration curves of X‐ray fluorescence activity versus analyte concentration for finite multicomponent media. The composition must be known for all components other than the low‐concentration analyte. If these compositions are not known, the system's mass absorption coefficient must be measured. The analyte must be present in low enough concentration so that it does not contribute significantly to the total mass absorption coefficient. The calibration curve for a multicomponent system is constructed numerically from data on analyte activity versus secondary component composition in binary systems (analyte plus one secondary component). Thus calibration curves for any system containing the analyte and n secondary components are constructed from data on the n corresponding binary systems. The method is found to reproduce measured activities of uranium solutions with an accuracy of 5–7%.